Mesoscopic organic nanosheets peeled from stacked 2D covalent frameworks

Abstract

Novel mesoscopic organic nanosheets were developed by functionalizing bulk 2D organic covalent framework polymers with small molecules. The water-soluble fluorescent nanosheets are promising as nanocarriers for biological applications.

Palladium catalyst coordinated in knitting N-heterocyclic carbene porous polymers for efficient Suzuki–Miyaura coupling reactions

“…18,19 The synthesis and catalytic application of microporous polyisocyanurate (PICU) have also been reported. 20,21 The high density of thiophene functionality in the frameworks makes CMPs good candidates for the encapsulation of metal clusters. 22 Polystyrene networks with rigid nanoscale cavities can be prepared by the cross-linking of phenyl rings to form hypercrosslinked polystyrene (HPS) networks.…”

Two-photon fluorescent microporous bithiophene polymer via Suzuki cross-coupling

“…As a novel category of organic supramolecular polymers that are constructed via covalent bonds using appropriate organic groups, porous organic polymers such as hyper-cross-linked polymers, 1 conjugated microporous polymers (CMP) [2][3][4][5][6][7] and covalent organic frameworks (COFs) [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] have attracted considerable interest due to their large specific surface area, high thermal stability and low skeleton density. From the viewpoint of the material synthesis, porous organic polymers represent interesting motifs because of their allowance for a flexible control over structural parameters through an appropriate topological design.…”

“…Recently, most studies have concentrated on developing synthetic methodologies aiming at the optimization of pore size and specific surface area. Among these, a kaleidoscope of organic reactions including condensation and esteration [8][9][10][11][12][13] reaction of aromatic diboronic acids, Suzuki cross-coupling, 3,4,7,[14][15][16][17] Ullmann coupling, 18 tripolymerization of iso-cyanates, 19,20 condensation of aldehydes with amines, [21][22][23] and the ionothermal reactions 24,25 have been successfully employed for synthesizing porous organic polymers. From the point of view of material functions, porous organic polymers are also exciting because of their promising applications in the fields such as gas storage, 10,11 molecule separation, 12 catalyst and its supports.…”

Functional porous organic polymers for heterogeneous catalysis

“…We have reported the synthesis and catalytic application of microporous polyisocyanurate (PICU) composed of rigid carbon and nitrogen networks. 57,58 The porous PICU 11 was synthesized by trimerization of di-isocyanate 11-1 with a 1,3-bis-tert-butyl-4,5-dihydroimidazol-2-ylidene (SI t Bu) catalyst in DMF at 80 1C (Scheme 12). The PICU 11 exhibits a moderate high surface area of 569 m 2 g À1 (pore volume 0.35 cm 3 g À1 ) and pore sizes dominated by micropores of 2-20 A ˚with an average pore diameter of 5 A ˚.…”